Crimes against them are punished far more severely.

I have to correct myself after reading your answer. I think in reality, counting parents, relatives, and schoolteachers, people really aren't punished more severely when they commit crimes against children. Particularly parents. It's only strangers who commit crimes against children, or people who commit sexually based offenses against them, that we really bother punishing.

On the other hand, it would be really interesting to see a workable alternative system proposed. This is all, "Kids don't have these rights!" as opposed to, "Here's the rights we should give them, how we'd enforce those rights, and how it would work out for the better!"